package org.yjqjian.com.ui;

import android.content.Context;
import android.graphics.drawable.Drawable;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.CycleInterpolator;
import android.view.animation.TranslateAnimation;
import android.widget.EditText;

import org.yjqjian.com.R;

import java.util.jar.Attributes;

/**
 * Created by Administrator on 2015/7/19.
 */
public class AutoClearEditText extends EditText implements View.OnFocusChangeListener,TextWatcher{

    /**
     * 删除按钮的引用
     */
    private Drawable mClearDrawable;


    /**
     * 控件是否有焦点
     */
    private boolean hasFoucs;

    public AutoClearEditText(Context context){
        this(context,null);
    }

    public AutoClearEditText(Context context,AttributeSet attrs){
        // 这里构造方法也很重要，不加这个很多属性不能再XML里面定义
        this(context,attrs, R.attr.editTextStyle);
    }

    public AutoClearEditText(Context context,AttributeSet attrs,int defStyle){
        super(context,attrs,defStyle);
        init();
    }

    private  void init(){

        // 获取EditText的DrawableRight,假如没有设置我们就使用默认的图片
        mClearDrawable = getCompoundDrawables()[2];
        if(mClearDrawable == null){
            mClearDrawable = getResources().getDrawable(R.drawable.auto_clear_selector);
        }

        mClearDrawable.setBounds(0,0,mClearDrawable.getIntrinsicWidth(),mClearDrawable.getIntrinsicHeight());

        // 默认设置隐藏图标
        setClearIconVisible(false);
        // 设置焦点改变的监听
        setOnFocusChangeListener(this);
        // 设置输入框里面内容发生改变的监听
        addTextChangedListener(this);
    }

    /**
     * 因为我们不能直接给EditText设置点击事件，所以我们用记住我们按下的位置来模拟点击事件 当我们按下的位置 在 EditText的宽度 -
     * 图标到控件右边的间距 - 图标的宽度 和 EditText的宽度 - 图标到控件右边的间距之间我们就算点击了图标，竖直方向就没有考虑
     */
    @Override
    public boolean onHoverEvent(MotionEvent event) {
        if(event.getAction() == MotionEvent.ACTION_UP){
            if(getCompoundDrawables()[2]!=null){
                boolean touchable = event.getX() > (getWidth() - getTotalPaddingRight())
                        && (event.getX() < ((getWidth() - getPaddingRight())));
                if(touchable){
                    this.setText("");
                }
            }
        }
        return super.onTouchEvent(event);
    }

    /**
     * 当ClearEditText焦点发生变化的时候，判断里面字符串长度设置清除图标的显示与隐藏
     */
    @Override
    public void onFocusChange(View v, boolean hasFocus) {

        this.hasFoucs = hasFocus;
        if(hasFocus){
            setClearIconVisible(getText().length()>0);
        }else
        {
            setClearIconVisible(false);
        }
    }


    /**
     * 当输入框里面内容发生变化的时候回调的方法
     */
    @Override
    public void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
        if(hasFoucs)
        {
            setClearIconVisible(text.length() > 0);
        }
    }

    @Override
    public void afterTextChanged(Editable s) {

    }

    @Override
    public void beforeTextChanged(CharSequence s, int start, int count,
                                  int after) {

    }

    /**
     * 设置清除图标的显示与隐藏，调用setCompoundDrawables为EditText绘制上去
     *
     * @param visible
     */
    protected void setClearIconVisible(boolean visible) {
        Drawable right = visible ? mClearDrawable :null;
        setCompoundDrawables(getCompoundDrawables()[0],
                getCompoundDrawables()[1],right,getCompoundDrawables()[3]);
    }
    /**
     * 设置晃动动画
     */
    public void setShakeAnimation(){
        this.setAnimation(shakeAnimation(5));
    }
    /**
     * 晃动动画
     *
     * @param counts
     *            1秒钟晃动多少下
     * @return
     */
    public static Animation shakeAnimation(int counts){
        Animation translateAnimation = new TranslateAnimation(0, 10, 0, 0);
        translateAnimation.setInterpolator(new CycleInterpolator(counts));
        translateAnimation.setDuration(1000);
        return translateAnimation;
    }
}
